4 years ago

Angles on a Straight line always add up to........... degrees

Mathematics

1 answer:

Elden [556K]4 years ago

4 0

Answer:

180°

Step-by-step explanation:

Angles that are called straight angles make up a straight line.

A straight line measures 180°.

So, angles on a straight line make up 180°.

Hope this helps.

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Circle D is shown. Line segments D E, D F, D G, and D H are radii. Angle E D F is 55 degrees, angle F D G is 70 degrees, and ang

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Answer:

see the explanation

Step-by-step explanation:

see the attached figure to better understand the problem

step 1

Find the measure of arc EH

Remember that the measure of the complete circle is equal to 360 degrees

$arc\ EH+arc\ EF+arc\ FG+arc\ GH=360^o$

Remember that

$arc\ EF=m\angle EDF$ ----> by central angle

$arc\ FG=m\angle FDG$ ----> by central angle

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substitute the given values

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step 2

Which arc is congruent to Arc E H?

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arc EH is congruent with arc EFG

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